Made with 75% ultra-wicking Micro-Denier acrylic, 15% nylon, and 10% spandex for exceptional comfort and strength. These socks feature the "Stretch-to-Fit" sizing system and exclusive "Easy-fit" cuff for a Perfect Fit every time on any foot. These features create superior softness and comfort and help eliminate blisters and hot spots. Sock Guy also feature a double stitched heel & toe for added strength and durability. Sock Guy delivers superior quality and high-tech comfort in every they make.